Good you are doing your investigation into what works with each camper. Also which size truck is needed to haul each of them around. For a good comparison, you also need to know or at least mention what kind of use you intend it for. Will you do weekenders or a couple weeks on the road or extended weeks-to-months adventures?
How it is outfitted is also important. Basic shell or with creature comforts already installed? If a basic shell, what are your intentions with regard to outfitting it before going out camping? It all boils down to SPACE divided by PEOPLE over COMPONENTS....
Knowing that a extended cab gives you more SPACE can be helpful also. However, it always gets back to insuring you have "enough truck" to haul around the camper, people, dogs, gear, food, etc. SAFELY!
You may choose to buy something like an "entry level" shell and build it out with an eye to replacing it with something bigger down the line but if you do, you would need to either replace the truck or buy one big enough to carry a bigger camper when the urge to upgrade bites you. If you can go check out a few of the options available and ask owners what works and what doesn't, you would save some grief down the line...after all, we each have our own design applications in mind based on our intended usage. That is no more evident than the many threads here about ice boxes vs 12-volt 'fridges and batteries and solar systems to power everything since all that has much to do with what the owners traveling plans are.
Good Luck....